000			00341nam a2200157Ia 4500
008			190201s9999 xx 000 0 und d
020			_a9.78E+12
082			_a512
082			_b5 VAR
100			_aVarga Richjard S.
245		0	_aGersgorin and His Circle
260			_aNew York
260			_bSpringer
260			_c2004
300			_a224
999			_c43404 _d43404